Tobias just informed me that their newer C++ module is indeed JUCE 6 compatible: https://github.com/Moonbase-sh/moonbase-cpp

Just swapped out my self-built solution with the C++ module with the help of Opus 5.5 - works like a charm! Nevertheless looking forward to see a official integration with HISE in the future :)

@Christoph-Hart Would love to hear an update about this! We already implemented Moonbase manually in our plugin but would rather use the official Moonbase Module for HISE, which unfortunately only runs on JUCE 8.

@Christoph-Hart this is how im passing the JSON data:

inline function requestDirectLicenseActivation(deviceName, deviceSignature, accessToken)
    {
        local requestData = {
            "deviceName": deviceName,
            "deviceSignature": deviceSignature
        };
        
        currentAccessToken = accessToken;
        
        makeHttpRequest("POST", "/client/licenses/" + PRODUCT_ID + "/request", trace(requestData), handleDirectLicenseResponse);
    }

Even when converting the JSON object using trace, I'm getting the 415 error due to an unsupported media type, as the endpoint will not receive the content as application/json, as its converted to x-www-form-urlencoded data.